The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2007
Filed:
Jun. 07, 2005
Masanobu Oomura, Yokohama, JP;
Takashi Morii, Kanagawa, JP;
Masanobu Oomura, Yokohama, JP;
Takashi Morii, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A recording head or the like having a voltage generating circuit which does not depend on a voltage fluctuation of a heater driving power source (first power source) is provided. The recording head has: a plurality of heaters connected to a power line VH as a heater driving power source; a power transistor as a switching element for independently driving each heater by supplying a current thereto; and a voltage generating circuit for supplying a voltage for a control signal for controlling the power transistor. The voltage generating circuit has a resistor Rconnected to a grounding potential and an n-type MOS transistor Tin which a reference voltage Vwhich is generated by supplying a constant current from a constant current source Ito the resistor Ris inputted to a gate.